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Testing Strategies for Model-Based Development - Bog af Mats P Heimdahl - Paperback

Testing Strategies for Model-Based Development - Bog af Mats P Heimdahl - Paperback

This report presents an approach for testing artifacts generated in a model-based development process. This approach divides the traditional testing process into two parts: requirements-based testing (validation testing) which determines whether the model implements the high-level requirements and model-based testing (conformance testing) which determines whether the code generated from a model is behaviorally equivalent to the model. The goals of the two processes differ significantly and this report..

DKK 179.95
2

Pti-Apwa Equipment Management Information System, Computer Program Testing Instructions - Bog - Paperback

Pti-Apwa Equipment Management Information System, Computer Program Testing Instructions - Bog - Paperback

These Equipment Management Information System: Testing Instructions are for use in conjunction with the Equipment Management Information System Implementation Handbook. (See Task 1 of the Implementation Handbook). These instructions are for use in benchmark testing the Equipment Management System computer programs as compiled in the receiving jurisdiction and in determining that the job streams have been properly developed. These Testing Instructions document the computer type containing the Equipment..

DKK 209.95
2

Lessons Learned from the Emu Fire and How It Impacts Cxp Suit Element Development and Testing - Bog af Jonathan Metts - Paperback

Lessons Learned from the Emu Fire and How It Impacts Cxp Suit Element Development and Testing - Bog af Jonathan Metts - Paperback

During testing a Space Shuttle Extravehicular Mobility Unit (EMU) pressure garment and life-support backpack was destroyed in a flash fire in the Johnson Space Center's Crew systems laboratory. This slide presentation reviews the accident, probable causes, the lessons learned and the effect this has on the testing and the environment for testing of the Space Suit for the Constellation Program.

DKK 158.95
2

Environmental Testing of the Next Pm1 Ion Engine - Bog af John S Snyder - Paperback

Environmental Testing of the Next Pm1 Ion Engine - Bog af John S Snyder - Paperback

The NEXT propulsion system is an advanced ion propulsion system presently under development that is oriented towards robotic exploration of the solar system using solar electric power. The Prototype Model engine PM1 was subjected to qualification-level environmental testing to demonstrate compatibility with environments representative of anticipated mission requirements. Random vibration testing, conducted with the thruster mated to the breadboard gimbal, was executed at 10.0 Grms for 2 minutes in..

DKK 157.95
2

Trmm Observations of Polarization Difference in 85 Ghz - Information about Hydrometeors and Rain Rate - Bog af C Prabhakara - Paperback

Trmm Observations of Polarization Difference in 85 Ghz - Information about Hydrometeors and Rain Rate - Bog af C Prabhakara - Paperback

Observations made by the Precipitation Radar (PR) and the Microwave Imager (TMI) radiometer on board the Tropical Rainfall Measuring Mission (TRMM) satellite help us to show the significance of the 85 GHz polarization difference, PD85, measured by TMI. Rain type, convective or stratiform, deduced from the PR allows us to infer that PD85 is generally positive in stratiform rain clouds, while PD85 can be markedly negative in deep convective rain clouds. Furthermore, PD85 increases in a gross manner..

DKK 158.95
2

Government Operations - Radon Testing in Federal Buildings Needs Improvement and HUD's Radon Policy Needs Strengthening: T-Rced-91-48 - Bog - Paperbac

Government Operations - Radon Testing in Federal Buildings Needs Improvement and HUD's Radon Policy Needs Strengthening: T-Rced-91-48 - Bog - Paperbac

GAO discussed: (1) the Department of Housing and Urban Development's (HUD) radon-testing policy for HUD-assisted housing; and (2) federal agencies' efforts to reduce radon hazards at federal facilities. GAO noted that: (1) 22 agencies reported the results of radon testing at their facilities to the Environmental Protection Agency (EPA), including 10 that submitted partial results and were continuing to test buildings and some that were taking mitigation actions to protect federal workers; (2) some..

DKK 148.95
2

Space Telecommunications Radio System (Strs) Compliance Testing - Bog af Louis M Handler - Paperback

Space Telecommunications Radio System (Strs) Compliance Testing - Bog af Louis M Handler - Paperback

The Space Telecommunications Radio System (STRS) defines an open architecture for software defined radios. This document describes the testing methodology to aid in determining the degree of compliance to the STRS architecture. Non-compliances are reported to the software and hardware developers as well as the NASA project manager so that any non-compliances may be fixed or waivers issued. Since the software developers may be divided into those that provide the operating environment including the..

DKK 178.95
2

Ed465 243 - Test and Measurement Expert Opinions - A Dialogue about Testing Students with Disabilities Out of Level in Large-Scale Assessments. Out-Of

Ed465 243 - Test and Measurement Expert Opinions - A Dialogue about Testing Students with Disabilities Out of Level in Large-Scale Assessments. Out-Of

Two focus groups of test and measurement experts were held to explore the use of out-of-level testing for students with disabilities. The participants (n=17) included state and federal level assessment personnel, test company employees, and university professors. A content analysis of the narrative results indicated that there was no clear consensus in supporting or not supporting out-of-level testing. Instead, focus group participants were able to adopt numerous perspectives on many contentious..

DKK 158.95
2

Truck Safety - States' Progress in Testing and Licensing Commercial Drivers: Rced-90-78 - Bog - Paperback

Truck Safety - States' Progress in Testing and Licensing Commercial Drivers: Rced-90-78 - Bog - Paperback

Pursuant to a congressional request, GAO reviewed federal and state efforts to implement the Commercial Motor Vehicle Safety Act of 1986. GAO found that: (1) at least 33 states indicated that they would have difficulty testing and licensing commercial truck drivers by the April 1, 1992 deadline; (2) most states experienced problems in making computer changes needed to connect to the national driver information system; (3) the Federal Highway Administration (FHwA) did not develop specific action plans..

DKK 129.95
2

Testing the Effectiveness of Mobile Home Weatherization Measures in a Controlled Environment - The Seri Cmfert Project - Bog - Paperback

Testing the Effectiveness of Mobile Home Weatherization Measures in a Controlled Environment - The Seri Cmfert Project - Bog - Paperback

For several years the Solar Energy Research Institute has been testing the effectiveness of mobile home weatherization measures. During the winter of 1988-89, several weatherization measures were thermally tested on three mobile homes under controlled conditions inside a large environmental enclosure. The effects of each weatherization measure on conduction losses, infiltration losses, and combined furnace and duct-delivered heat efficiency were monitored. The study demonstrated that cost-effective..

DKK 145.95
2

Baseline Testing of Ultracapacitors for the Next Generation Launch Technology (Nglt) Project - Bog af Dennis J Eichenberg - Paperback

Baseline Testing of Ultracapacitors for the Next Generation Launch Technology (Nglt) Project - Bog af Dennis J Eichenberg - Paperback

The NASA John H. Glenn Research Center initiated baseline testing of ultracapacitors for the Next Generation Launch Transportation (NGLT) project to obtain empirical data for determining the feasibility of using ultracapacitors for the project. There are large transient loads associated with NGLT that require either a very large primary energy source or an energy storage system. The primary power source used for these tests is a proton exchange membrane (PEM) fuel cell. The energy storage system..

DKK 128.95
2

New Method for Dual-Axis Fatigue Testing of Large Wind Turbine Blades Using Resonance Excitation and Spectral Loading - Bog - Paperback

New Method for Dual-Axis Fatigue Testing of Large Wind Turbine Blades Using Resonance Excitation and Spectral Loading - Bog - Paperback

The blades of a wind turbine are generally considered to be the most critical component of the wind turbine system. The fundamental purpose of performing fatigue tests on wind turbine blades is to demonstrate that a blade, when manufactured to a certain set of specifications, has the prescribed reliability and service life. The purpose of the research conducted for this project is the advancement of knowledge and capabilities in the area of wind turbine blade fatigue testing.

DKK 245.95
2